Covariate balance is the extent to which the distribution of covariates is similar across the intervention groups.
Standardized mean differences
The Standardized Mean Difference (SMD) represents a standardized difference in mean between contrasted intervention groups for each covariate.
|
|
Means intervention group
|
Means control group
|
Standardized mean difference
|
|
distance
|
0.89839344
|
0.89700714
|
0.125175777
|
|
age_cd
|
11.59381714
|
11.58271865
|
0.003749979
|
|
sex_cd
|
1.46657914
|
1.48366702
|
-0.031811299
|
|
residence_area_cd731
|
0.13965147
|
0.14646997
|
-0.019671111
|
|
residence_area_cd732
|
0.14108379
|
0.12961012
|
0.032960105
|
|
residence_area_cd733
|
0.71926474
|
0.72391992
|
-0.010359603
|
|
institutionalized_blTRUE
|
0.02781093
|
0.02950474
|
-0.010301042
|
|
foreign_blTRUE
|
0.15170685
|
0.12961012
|
0.061596004
|
|
pregnancy_blTRUE
|
0.01181666
|
0.02107482
|
-0.085675800
|
|
essential_worker_blTRUE
|
0.02757221
|
0.02845100
|
-0.005366853
|
|
comorbidities_blTRUE
|
0.45977560
|
0.47523709
|
-0.031023533
|
|
immunestatus_blTRUE
|
0.28037718
|
0.26343519
|
0.037717288
|
|
|
Means intervention group
|
Means control group
|
Standardized mean difference
|
|
distance
|
0.50039405
|
0.49960595
|
0.055113115
|
|
age_cd
|
11.58454344
|
11.56153089
|
0.007782637
|
|
sex_cd
|
1.46431208
|
1.45274428
|
0.021522477
|
|
residence_area_cd731
|
0.13942899
|
0.14398228
|
-0.013144831
|
|
residence_area_cd732
|
0.14078267
|
0.12441546
|
0.047059651
|
|
residence_area_cd733
|
0.71978833
|
0.73160226
|
-0.026305642
|
|
institutionalized_blTRUE
|
0.02768890
|
0.02695053
|
0.004500067
|
|
foreign_blTRUE
|
0.15185823
|
0.15148905
|
0.001028705
|
|
pregnancy_blTRUE
|
0.01193699
|
0.01021413
|
0.015863954
|
|
essential_worker_blTRUE
|
0.02781196
|
0.02756584
|
0.001496795
|
|
comorbidities_blTRUE
|
0.45975880
|
0.45815900
|
0.003210019
|
|
immunestatus_blTRUE
|
0.28058085
|
0.28144228
|
-0.001917349
|
Variance ratios
The variance ratio (VR) represents the ratio of the variance in the contracted intervention groups for each covariate. A VR close to 1, implies that variances are similar in the compared groups and as such indicates good covariate balance.
|
|
Var. Ratio
|
|
distance
|
0.7576281
|
|
age_cd
|
0.9708949
|
|
sex_cd
|
0.9875230
|
|
residence_area_cd731
|
NA
|
|
residence_area_cd732
|
NA
|
|
residence_area_cd733
|
NA
|
|
institutionalized_blTRUE
|
NA
|
|
foreign_blTRUE
|
NA
|
|
pregnancy_blTRUE
|
NA
|
|
essential_worker_blTRUE
|
NA
|
|
comorbidities_blTRUE
|
NA
|
|
immunestatus_blTRUE
|
NA
|
|
|
Var. Ratio
|
|
distance
|
1.0803891
|
|
age_cd
|
0.9802497
|
|
sex_cd
|
0.9590565
|
|
residence_area_cd731
|
NA
|
|
residence_area_cd732
|
NA
|
|
residence_area_cd733
|
NA
|
|
institutionalized_blTRUE
|
NA
|
|
foreign_blTRUE
|
NA
|
|
pregnancy_blTRUE
|
NA
|
|
essential_worker_blTRUE
|
NA
|
|
comorbidities_blTRUE
|
NA
|
|
immunestatus_blTRUE
|
NA
|
Propensity score distribution